An Overlay-based
Virtual Network Substrate
SpoVNet

source: source/ariba/utility/transport/tcpip/protlib/eclock_gettime.c @ 9686

Last change on this file since 9686 was 9686, checked in by mies, 8 years ago

put protlib doc to protlib module

File size: 2.5 KB
Line 
1/// ----------------------------------------*- mode: C++; -*--
2/// @file eclock_gettime.c
3/// emulates a clock_gettime call for systems not having it
4/// ----------------------------------------------------------
5/// $Id: eclock_gettime.c 2549 2007-04-02 22:17:37Z bless $
6/// $HeadURL: https://svn.ipv6.tm.uka.de/nsis/protlib/trunk/fastqueue/eclock_gettime.c $
7// ===========================================================
8//                     
9// Copyright (C) 2005-2007, all rights reserved by
10// - Institute of Telematics, Universitaet Karlsruhe (TH)
11//
12// More information and contact:
13// https://projekte.tm.uka.de/trac/NSIS
14//                     
15// This program is free software; you can redistribute it and/or modify
16// it under the terms of the GNU General Public License as published by
17// the Free Software Foundation; version 2 of the License
18//
19// This program is distributed in the hope that it will be useful,
20// but WITHOUT ANY WARRANTY; without even the implied warranty of
21// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22// GNU General Public License for more details.
23//
24// You should have received a copy of the GNU General Public License along
25// with this program; if not, write to the Free Software Foundation, Inc.,
26// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27//
28// ===========================================================
29/** @addtogroup protlib
30 * @{
31 */
32
33
34
35#include <sys/time.h>
36#include <unistd.h>
37
38/* struct timezone tz = { 0, DST_NONE }; */
39static struct timeval tv;
40typedef int             clockid_t;
41
42/* syntax for clock_gettime:
43   int clock_gettime (clockid_t clock_id, struct timespec *tp);
44
45   to supply it include the following (because of speed):
46   extern int eclock_gettime(struct timespec *tp);
47   #define clock_gettime(clock_id, tspec) eclock_gettime(tspec)
48*/
49
50int eclock_gettime(struct timespec *tp)
51{
52  /* DESCRIPTION
53
54  The clock_gettime function returns the current time (in seconds and
55  nanoseconds) for the specified clock.  The clock_settime function sets the
56  specified clock. The CLOCK_REALTIME clock measures the amount of time
57  elapsed since 00:00:00:00 January 1, 1970 Greenwich Mean Time (GMT), other-
58  wise known as the Epoch. Time values  that fall between two non-negative
59  integer multiples of the resolution are truncated down to the smaller mul-
60  tiple of the resolution.
61
62  */
63  if (gettimeofday(&tv, 0) == 0)
64  {
65#ifdef DEBUG
66    if (tp)
67#endif
68    {
69      tp->tv_sec= tv.tv_sec;
70      tp->tv_nsec= tv.tv_usec*1000;
71      return 0;
72    }
73  }
74  else
75    return -1;
76}
77
78//@}
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